TwinView/Xinerama performance issues on 3 screens
 

I'm running a 2x GFX cards, 1 AGP 6800GT and 1x PCI 5200FX. I have gotten all 3 screens running in a combined mode using either TwinView or Xinerama.

However. Under Xinerama, the performance is awful, very very slow to redraw windows etc. Under Twinview on 3 screens (2 using TwinView, 1 using Xinerama), the TwinView'd screens span video etc over both of them, whereas if i dont have the 3rd screen active, they dont (a full screen video will only full screen to one screen, which is what i want). I have read the ReadMe with the driver, and it does mention about using Xinerama and TwinView together will cause certain problems with TwinView etc, and I can only assume this is one of them.

Is there anyway to either increase performance under a Xinerama screen setup, or prevent applications etc spanning 2 screens with TwinView & Xinerama?

I have tried the NoTwinViewXineramaInfo option, but this has had no effect.

Can anyone help?